volume 25, issue 10, P2119-2123 1989
DOI: 10.1109/3.35724
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Abstract: The fluorescence spectrum of praseodymium in a silica host has been investigated through the direct excitation of the 'P(], ID,, and 'G, absorption bands, which occur at around 488, 590, and 974 nm, respectively. The observed spontaneous emission consists of four main bands with peaks at 633, 707,888, and 1080 nm. In each case the level principally responsible for these emissions was found to be IDz. Stimulated emission has been seen for the first time at 888 nm for a threshold of 10 mW absorbed power. In addi…

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